I couldn't find anything on these ports either. It's possible they're used by a trojan program.

First scan all your machines behind your router for these open ports. It's possible one of your machines has been infected with a trojan, "phoned home", and now the attacker is trying to gain access.
Just to be safe, run a full virus scan and adware/malware scan or your machines.

If these scans come up negative, and you don't have the ports open on any of your machines, then you're probably safe.